Electronics > Beginners
Voltage reference not working properly #SOLVED#
iMo:
Is the -5V still -5V when -2.5V is pulled up to +0.99 or +0.77V??
PCB: your -2.5V is connected to the R29's wiper, isn't it?
FotatoPotato:
:palm: ....... Oh my lord I cannot believe this :-DD
all this time spent, and I connected -2.5v to the damn wiper. SMH
I'll go fix that and take a look at the results
FotatoPotato:
Hey presto, there you go
Everything works now. I can't believe this was the issue... You guys saw the schematics, they were correct, but for some reason, the default Altium library switches pin 3 and the wiper |O.....
For everyone who has pitched in on this post I want to say thank you so much, I really appreciate the help and it feels awesome to get so much help on this.
Again, I can't thank you guys enough ;D
StillTrying:
:phew:
I said it was the VR29 wiper on the previous page, :) although I didn't think it was going to be VR29 at all until you'd seen the -5V and +4.096V stable but the -2.5V still not.
As I'm closing down all these data sheets, - the max. allowed -0.3V current in to the AD8660's inputs is 5mA.
iMo:
Therefore I would go with 33k resistor between OP277 output and AD8360 input :)
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